<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类参数</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-alert type="warning" title="注意:只允许为第三级分类设置相关参数!"
                show-icon :closable="false"></el-alert>
      <el-row>
        <el-col>
          <span>选择商品分类</span>
          <el-cascader
              v-model="selectedCateKeys"
              :options="cateList"
              :props="cateProps"
              @change="handleCateChange"></el-cascader>
        </el-col>
      </el-row>
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <el-tab-pane label="动态参数" name="many">
          <el-button type="primary" size="mini"
                     :disabled="isBtnDisable"
                     @click="addDialogVisible=true">添加参数
          </el-button>
          <el-table :data="manyTabData" border strip>
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag type="warning" v-for="(item, index) in scope.row.attr_vals"
                        :key="index" closable @close="handleTagClose(index, scope.row)">{{ item }}
                </el-tag>
                <el-input
                    class="input-new-tag"
                    v-if="scope.row.inputVisible"
                    v-model="scope.row.inputValue"
                    ref="saveTagInput"
                    size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button v-else type="warning" class="button-new-tag" size="small"
                           @click="showInput(scope.row)">+ New Tag
                </el-button>
              </template>
            </el-table-column>
            <el-table-column label="序号" type="index"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" icon="el-icon-edit" size="mini"
                           @click="showEditDialog(scope.row.attr_id)">修改
                </el-button>
                <el-button type="danger" icon="el-icon-delete" size="mini"
                           @click="removeParams(scope.row.attr_id)">删除
                </el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <el-tab-pane label="静态属性" name="only">
          <el-button type="primary" size="mini"
                     :disabled="isBtnDisable"
                     @click="addDialogVisible=true">添加属性
          </el-button>
          <el-table :data="onlyTabData" border strip>
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag type="warning" v-for="(item, index) in scope.row.attr_vals"
                        :key="index" closable @close="handleTagClose(index, scope.row)">{{ item }}
                </el-tag>
                <el-input
                    class="input-new-tag"
                    v-if="scope.row.inputVisible"
                    v-model="scope.row.inputValue"
                    ref="saveTagInput"
                    size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button v-else type="warning" class="button-new-tag" size="small"
                           @click="showInput(scope.row)">+ New Tag
                </el-button>
              </template>
            </el-table-column>
            <el-table-column label="序号" type="index"></el-table-column>
            <el-table-column label="属性名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" icon="el-icon-edit" size="mini"
                           @click="showEditDialog(scope.row.attr_id)">修改
                </el-button>
                <el-button type="danger" icon="el-icon-delete" size="mini"
                           @click="removeParams(scope.row.attr_id)">删除
                </el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <el-dialog
        :title="'添加'+dialogTitle"
        :visible.sync="addDialogVisible"
        width="50%" @close="addDialogClosed">
      <el-form :model="addForm"
               :rules="addFormRules"
               ref="addFormRef"
               label-width="80px">
        <el-form-item :label="dialogTitle" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
          <el-button @click="addDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addParams">确 定</el-button>
        </span>
    </el-dialog>
    <el-dialog
        :title="'修改'+dialogTitle"
        :visible.sync="editDialogVisible"
        width="50%" @close="editDialogClosed">
      <el-form :model="editForm"
               :rules="editFormRules"
               ref="editFormRef"
               label-width="80px">
        <el-form-item :label="dialogTitle" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editParams">确 定</el-button>
        </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      cateList: [],
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
        expandTrigger: 'hover',
      },
      selectedCateKeys: [],
      activeName: 'many',
      manyTabData: [],
      onlyTabData: [],
      addDialogVisible: false,
      addForm: {
        attr_name: '',
      },
      addFormRules: {
        attr_name: [
          {required: true, message: '请输入参数名称', trigger: 'blur'}
        ]
      },
      editDialogVisible: false,
      editForm: {},
      editFormRules: {
        attr_name: [
          {required: true, message: '请输入参数名称', trigger: 'blur'}
        ]
      },
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const {data: res} = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败')
      }
      // console.log(res.data)
      this.cateList = res.data
    },
    handleCateChange() {
      // console.log(this.selectedCateKeys)
      this.getParamsList()
    },
    handleTabClick() {
      this.getParamsList()
    },
    async getParamsList() {
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = []
        this.manyTabData = []
        this.onlyTabData = []
        return
      }
      const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`,
          {params: {sel: this.activeName}})
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数列表失败')
      }
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        item.inputVisible = false
        item.inputValue = ''
      })
      if (this.activeName === 'many') {
        this.manyTabData = res.data
      } else {
        this.onlyTabData = res.data
      }
    },
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    addParams() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const {data: res} = await this.$http.post(`categories/${this.cateId}/attributes`,
            {
              attr_name: this.addForm.attr_name,
              attr_sel: this.activeName
            })
        if (res.meta.status !== 201) {
          return this.$message.error('添加参数失败')
        }
        this.addDialogVisible = false
        this.getParamsList()
        this.$message.success('添加参数成功')
      })
    },
    async showEditDialog(attr_id) {
      const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,
          {
            params: {
              attr_sel: this.activeName
            }
          })
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数信息失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    editParams() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const {data: res} = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
            {
              attr_name: this.editForm.attr_name,
              attr_sel: this.activeName,
            })
        if (res.meta.status !== 200) {
          return this.$message.error('修改参数失败')
        }
        this.$message.success('修改参数成功')
        this.editDialogVisible = false
        this.getParamsList()
      })
    },
    async removeParams(attr_id) {
      const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?',
          '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消参数删除')
      }
      const {data: res} = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除参数失败')
      }
      this.$message.success('删除参数成功')
      this.getParamsList()
      this.editDialogVisible = false
    },
    handleInputConfirm(row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return
      }
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      this.saveAttrVals(row)
    },
    showInput(row) {
      row.inputVisible = true
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus();
      });
    },
    handleTagClose(index, row) {
      row.attr_vals.splice(index, 1)
      this.saveAttrVals(row)
    },
    async saveAttrVals(row) {
      const {data: res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,
          {
            attr_name: row.attr_name,
            attr_sel: row.attr_sel,
            attr_vals: row.attr_vals.join(' '),
          })
      if (res.meta.status !== 200) {
        return this.$message.error('修改参数项失败')
      }
      this.$message.success('修改参数项成功')
    }
  },
  computed: {
    isBtnDisable() {
      if (this.selectedCateKeys.length !== 3) {
        return true
      }
      return false
    },
    cateId() {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2]
      }
      return null
    },
    dialogTitle() {
      if (this.activeName === 'many') {
        return '动态参数'
      } else {
        return '静态属性'
      }
    },
  }
}
</script>

<style scoped>
.el-row {
  margin: 15px 0;
}

.el-cascader {
  width: 260px;
  margin-left: 15px;
}

.el-tag {
  margin-left: 10px;
}

.input-new-tag {
  width: 120px;
  margin-left: 10px;
  vertical-align: bottom;
}

.button-new-tag {
  margin-left: 10px;
  height: 32px;
  line-height: 30px;
  padding-top: 0;
  padding-bottom: 0;
}
</style>